I was impressed by..

I could not believe the knowledge that Bruno has obtained about the Holocaust. Even though no one informed him about what was going on, he picked up clues piece by piece and put it all together. His parents were dumbfounded when they saw at the end of the book he had managed to dig a hole underneath the barbed wire fence and go on the other side with Shmuel. Bruno's inteligence was taken for granted; he may not have been "school smart, but he was definately "street smart".